Collapisble bollard



FIG. 1 is a front perspective view of an improved collapsible bollardshowing our new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevation thereof; and,

FIG. 5 is a side elevation thereof.

The ornamental design for a collapsible bollard, as shown and described.